I have a 6.5 Carcano Carbine that I would like to shoot cast bullets in due to its age and the lack of proper .268" jacketed bullets. The problem is that the bore is kind of rough. Looking through it with just an eyeball and a light, it looks pretty good, but when I use a bore scope, it looks pretty nasty. I slugged the bore at just over .268" and the cast bullets I have are .269". When I loaded some up with a light load, they leaded the bore pretty bad. It has strong rifling, but there are some pits and rough spots that the lead latches onto.
What options do I have? Should I shoot it until the lead fills in the pits, or should I stick to .264" jacketed bullets? I have cleaned it thoroughly, and even run some JB Bore paste through it, but the problem still persists.